/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.streams.riak.http;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.core.StreamsPersistReader;
import org.apache.streams.core.StreamsResultSet;
import org.apache.streams.jackson.StreamsJacksonMapper;
import org.apache.streams.riak.pojo.RiakConfiguration;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.google.common.collect.Queues;
import org.apache.commons.lang.NotImplementedException;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.util.EntityUtils;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.math.BigInteger;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Iterator;
import java.util.Queue;
import java.util.concurrent.LinkedBlockingQueue;
/**
* RiakHttpPersistReader reads documents from riak via http.
*/
public class RiakHttpPersistReader implements StreamsPersistReader {
private RiakConfiguration configuration;
private RiakHttpClient client;
private static final Logger LOGGER = LoggerFactory.getLogger(RiakHttpPersistReader.class);
private static final ObjectMapper MAPPER = StreamsJacksonMapper.getInstance();
public RiakHttpPersistReader(RiakConfiguration configuration) {
this.configuration = configuration;
}
@Override
public String getId() {
return "RiakHttpPersistReader";
}
@Override
public void prepare(Object configurationObject) {
client = RiakHttpClient.getInstance(this.configuration);
}
@Override
public void cleanUp() {
client = null;
}
@Override
public StreamsResultSet readAll() {
Queue<StreamsDatum> readAllQueue = constructQueue();
URIBuilder lk = null;
try {
lk = new URIBuilder(client.baseURI.toString());
lk.setPath(client.baseURI.getPath().concat("/buckets/"+configuration.getDefaultBucket()+"/keys"));
lk.setParameter("keys", "true");
} catch (URISyntaxException e) {
LOGGER.warn("URISyntaxException", e);
}
HttpResponse lkResponse = null;
try {
HttpGet lkGet = new HttpGet(lk.build());
lkResponse = client.client().execute(lkGet);
} catch (IOException e) {
LOGGER.warn("IOException", e);
return null;
} catch (URISyntaxException e) {
LOGGER.warn("URISyntaxException", e);
return null;
}
String lkEntityString = null;
try {
lkEntityString = EntityUtils.toString(lkResponse.getEntity());
} catch (IOException e) {
LOGGER.warn("IOException", e);
return null;
}
JsonNode lkEntityNode = null;
try {
lkEntityNode = MAPPER.readValue(lkEntityString, JsonNode.class);
} catch (IOException e) {
LOGGER.warn("IOException", e);
return null;
}
ArrayNode keysArray = null;
keysArray = (ArrayNode) lkEntityNode.get("keys");
Iterator<JsonNode> keysIterator = keysArray.iterator();
while( keysIterator.hasNext()) {
JsonNode keyNode = keysIterator.next();
String key = keyNode.asText();
URIBuilder gk = null;
try {
gk = new URIBuilder(client.baseURI.toString());
gk.setPath(client.baseURI.getPath().concat("/buckets/"+configuration.getDefaultBucket()+"/keys/"+key));
} catch (URISyntaxException e) {
LOGGER.warn("URISyntaxException", e);
continue;
}
HttpResponse gkResponse = null;
try {
HttpGet gkGet = new HttpGet(gk.build());
gkResponse = client.client().execute(gkGet);
} catch (IOException e) {
LOGGER.warn("IOException", e);
continue;
} catch (URISyntaxException e) {
LOGGER.warn("URISyntaxException", e);
continue;
}
String gkEntityString = null;
try {
gkEntityString = EntityUtils.toString(gkResponse.getEntity());
} catch (IOException e) {
LOGGER.warn("IOException", e);
continue;
}
readAllQueue.add(new StreamsDatum(gkEntityString, key));
}
return new StreamsResultSet(readAllQueue);
}
@Override
public void startStream() {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readCurrent() {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readNew(BigInteger sequence) {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readRange(DateTime start, DateTime end) {
throw new NotImplementedException();
}
@Override
public boolean isRunning() {
return false;
}
private Queue<StreamsDatum> constructQueue() {
return Queues.synchronizedQueue(new LinkedBlockingQueue<StreamsDatum>(10000));
}
}